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  #1  
Old 10-06-2018, 02:58 PM
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boulder4x4 boulder4x4 is offline
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Can I install a trans HP22 from an 02 in my 04 that has a 24 ?
I mean they are both disco 2's.
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Old 10-06-2018, 09:38 PM
JohnnoK JohnnoK is offline
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Physically, it will fit. You will need the appropriate torque converter for the 24 and the correct ECU for the tranny.

I don't know if the wiring looms are different, but you may find they will be. I'd start with RAVE for the wiring schematics and do something like a pin to pin comparison for a wire count of both models and take it from there.
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Old 10-06-2018, 11:32 PM
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I will need a different ECU even though its still a DII?

I thought I could just throw it in and drive off into the sunset....
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Old 10-07-2018, 03:32 PM
Swedjen2 Swedjen2 is offline
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The HP 22 is a down grade from the 24. According to the ZF website, the 22 is rated to 258 ft/lbs and the 24 is rated to 331 ft/lbs.
Sice your 4.6 has 300 ft/lbs of torque,the 24 is the one you should have installed.
Ashcroft has good information on the differences and upgrades from the 22 to the 24.
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  #5  
Old 10-07-2018, 07:21 PM
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roger that... I will do my research. thank you for the insight.
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  #6  
Old 10-07-2018, 09:21 PM
JohnnoK JohnnoK is offline
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Quote:
Originally Posted by boulder4x4 View Post
I will need a different ECU even though its still a DII? ....
Possibly, yes. The 24 is more electronic if I understand it correctly.
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  #7  
Old 10-08-2018, 12:48 AM
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Pump length is different, brackets are different to accommodate the 1/2” longer pump . Axle housings are different to keep the pinion angles correct.
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Old 10-09-2018, 04:56 PM
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Quote:
Originally Posted by robertf View Post
Pump length is different, brackets are different to accommodate the 1/2? longer pump . Axle housings are different to keep the pinion angles correct.
Yup. TC will find that the mounts dont line up with the frame because the tranny is 8mm or so longer.
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  #9  
Old 10-10-2018, 10:14 AM
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Ok, so here is the deal... I pulled a hp22 from my friends rover but I know now it will not work. So do I rebuild the hp24 that is on my garage floor that only has reverse or get one from a junkyard and just put it in and drive it till it breaks?
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Old 10-10-2018, 01:12 PM
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I can't tell you exactly what to do in this case, but your situation sounds like a classic case of whatever choice you make, it will be the wrong one. Good luck.
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Old 10-10-2018, 01:21 PM
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A properly rebuilt transmission is better than a worn out one.
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Old 10-10-2018, 02:16 PM
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This is interesting information, so everyone who dropped a 4.6 in their pre-03 truck is sitting on a ticking time bomb? I'd say unlikely as we typically don't drive these trucks like BMWs...
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  #13  
Old 10-10-2018, 03:14 PM
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Anyone have trans problems with their 4.6 in a pre 03? I would like to know... I do wheel my Disco but nothing hard. Maybe I just put the HP22 in and see what happens. But what to do about the mounts? aren't they different? PDOGG I agree about the rebuilt trans but I like the price of a junkyard one better.
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  #14  
Old 10-10-2018, 03:23 PM
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Quote:
Originally Posted by boulder4x4 View Post
I agree about the rebuilt trans but I like the price of a junkyard one better.
Why don't you ask around a bit? Sometimes Will Tillery or Marty's successors get in trucks with recently upgraded or rebuilt parts. Maybe check with some of the places that do diesel conversions - they must do something with the ZFs they take out to replace with R380s.
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  #15  
Old 10-10-2018, 06:04 PM
Leadvagas Leadvagas is offline
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Check with Matt at Roadside Werx in Lakewood, while he is predominantly a Defender guy he parts Discos and P38’s etc. And he is a lot closer than Will.
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